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At a Glance: Name: Caius – Meaning: traditionally glossed 'to rejoice,' though the Roman name's real root is unknown – Origin: Latin (variant of Gaius) – Gender: Boy – Pronunciation: KY-us
Caius (pronounced KY-us) is a Latin variant of Gaius, and it's often described as meaning 'rejoice' — but that's actually a popular myth, not a settled fact: 'rejoice' comes from an old folk etymology, and the true root of Gaius/Caius is unknown. If you like names with clean, modern lines and real Latin roots, Caius fits that description.
Meaning & Origin of Caius
Meaning: Traditionally glossed 'to rejoice,' though the roman name's real root is unknown.
Origin: Latin (variant of Gaius).
A common claim: Rejoice Actually: 'Rejoice' is an ancient folk etymology (Latin gaudere) that stuck; the real origin of Gaius/Caius is actually unknown.
Source: Wiktionary.
How to Pronounce Caius
Phonetic: KY-us IPA: /ˈkaɪəs/
Popularity of Caius
In 2024, 205 baby boys were named Caius, ranking it #1061 nationally — and per SSA records going back to 1994, that's also the highest rank the name has ever reached.
Source: U.S. Social Security Administration birth-name data, 1994–2024.
Make Caius Name Art
Free printable nursery art for Caius, pre-loaded below — pick a layout, palette, and font, then download a print-ready PNG.
Names With a Similar Story
Derived from shared style, era, and origin data (or, for names we have no style data for, a similar Social Security popularity trajectory) — not a hand-picked list.
FAQ
What does the name Caius mean?
Traditionally glossed ‘to rejoice,’ though the roman name’s real root is unknown. (Source: Wiktionary, https://en.wiktionary.org/wiki/Caius)
How do you pronounce Caius?
Caius is pronounced KY-us (IPA: /ˈkaɪəs/).
Is Caius a popular name right now?
Caius is at its highest recorded popularity right now, ranked #1061 in 2024. (U.S. Social Security Administration data, 1994–2024.)
📊 How popular is Caius? See the full popularity history, trend data, and ranking since 1880 with our free Baby Name Popularity Checker.
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